import React, {Component} from 'react';
import './Demo.css'

class Parent extends Component {
    render() {
        return (
            <div className="parent">
                <h3>我是Parent组件</h3>
                <A render={(name) => <B name={name}></B>}></A>
            </div>
        );
    }
}

class A extends Component {
    state = {name: 'tom'}

    render() {
        const {name} = this.state
        return (
            <div className="a">
                <h3>我是A组件</h3>
                {this.props.render(name)}
            </div>
        )
    }
}


class B extends Component {
    render() {
        return (
            <div className="b">
                <h3>我是B组件,{this.props.name}</h3>
            </div>
        )
    }
}

export default Parent;